<style>
  /*全局页面设置*/
  #preloadingAnimation {
    position: fixed;
    left: 0;
    top: 0;
    height: 100%;
    width: 100%;
    background: #49a9ee;
    user-select: none;
    z-index: 9999;
    overflow: hidden
  }
  /*加载*/
  @keyframes lds-roller {
    0% {
      transform: rotate(0deg);
    }
    100% {
      transform: rotate(360deg);
    }
  }
  .lds-roller {
    display: inline-block;
    position: relative;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 84px;
    height: 84px;
  }

  .lds-roller div {
    animation: lds-roller 1.2s cubic-bezier(0.5, 0, 0.5, 1) infinite;
    transform-origin: 32px 32px;
  }

  .lds-roller div:after {
    content: " ";
    display: block;
    position: absolute;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #FFF;
    margin: -3px 0 0 -3px;
  }

  .lds-roller div:nth-child(1) {
    animation-delay: -0.036s;
  }

  .lds-roller div:nth-child(1):after {
    top: 50px;
    left: 50px;
  }

  .lds-roller div:nth-child(2) {
    animation-delay: -0.072s;
  }

  .lds-roller div:nth-child(2):after {
    top: 54px;
    left: 45px;
  }

  .lds-roller div:nth-child(3) {
    animation-delay: -0.108s;
  }

  .lds-roller div:nth-child(3):after {
    top: 57px;
    left: 39px;
  }

  .lds-roller div:nth-child(4) {
    animation-delay: -0.144s;
  }

  .lds-roller div:nth-child(4):after {
    top: 58px;
    left: 32px;
  }

  .lds-roller div:nth-child(5) {
    animation-delay: -0.18s;
  }

  .lds-roller div:nth-child(5):after {
    top: 57px;
    left: 25px;
  }

  .lds-roller div:nth-child(6) {
    animation-delay: -0.216s;
  }

  .lds-roller div:nth-child(6):after {
    top: 54px;
    left: 19px;
  }

  .lds-roller div:nth-child(7) {
    animation-delay: -0.252s;
  }

  .lds-roller div:nth-child(7):after {
    top: 50px;
    left: 14px;
  }

  .lds-roller div:nth-child(8) {
    animation-delay: -0.288s;
  }

  .lds-roller div:nth-child(8):after {
    top: 45px;
    left: 10px;
  }
   /*加载文本*/
  .load-tips {
    color: #FFF;
    font-size: 14px;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    margin-top: 80px;
    text-align: center;
    width: 400px;
    height: 64px;
  }
  h3 {
    margin: 0;
    padding: 0;
  }
</style>

<div id="preloadingAnimation">
  <div class="lds-roller">
    <div></div>
    <div></div>
    <div></div>
    <div></div>
    <div></div>
    <div></div>
    <div></div>
    <div></div>
  </div>
  <div class="load-tips">
    <h3>Loading...</h3>
  </div>
</div>
